Diagnostic Trouble Code (DTC) Information CEM-8F17

Condition 

The central electronic module (CEM) checks the signal from the left-hand Xenon lamp.

The diagnostic trouble code (DTC) is stored if the central electronic module (CEM) registers that the signal from the left-hand Xenon bulb is faulty.

The diagnostic trouble code (DTC) can be detected when the ignition has been on for at least 10 seconds and the battery voltage is above 10.5 V.

The diagnostic trouble code (DTC) can be diagnosed at ignition switch position II.

Substitute Value 

• Shortest headlamp range will be used.

Possible Source 

• Damaged gas discharge lamp module (GDL).

Fault symptom[s] 

• The low beam is constantly lit
• The high beam is constantly lit
• The road surface is not illuminated.
• Headlights/Headlight aim is off